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Sounding rocket. Year: 1970. Family: Minuteman. Country: USA. 2 stage vehicle consisting of 1 x M55E1 + 1 x SR19AJ1 Manufacturer: Boeing. Launches: 3. First Launch Date: 1970-03-14. Last Launch Date: 1974-10-24. Launch data is: complete. Apogee: 50 km (31 mi). Liftoff Thrust: 935.000 kN (210,196 lbf). Total Mass: 30,000 kg (66,000 lb). Core Diameter: 1.68 m (5.51 ft). Total Length: 16.00 m (52.00 ft).
M55E1 Chronology 1970 March 14 - 18:00 GMT - Launch Site: Cape Canaveral. Launch Complex: LC31. Launch Pad: LC31A/Truck. Launch Vehicle: M55E1. - Sheltered Base research and development mission Nation: USA. Agency: USAF AFSC. Apogee: 1.00 km (0.60 mi). References: 807.
1974 September 8 - Launch Site: Vandenberg. Launch Complex: WTR. Launch Pad: SLBM Launch Area. Launch Vehicle: M55E1. - Test mission Nation: USA. Agency: USAF AFSC. Apogee: 50 km (31 mi). References: 916.
1974 October 24 - Launch Site: Vandenberg. Launch Complex: WTR. Launch Pad: SLBM Launch Area. Launch Vehicle: M55E1. - Test mission Nation: USA. Agency: USAF AFSC. Apogee: 50 km (31 mi). References: 916.
Bibliography and Further Reading - McDowell, Jonathan, Jonathan's Space Home Page, Harvard University, 1997-present. Jonathan McDowell's complete on-line listing of all objects orbited and over 20,000 rocket launches Accessed at: http://www.planet4589.org/jsr.html.
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